Abstract: The thermionic valve tester (10) has a casing (11) and three valve sockets (12) each of which is adapted to receive and has terminals for connection with the electrode pins of different types of thermionic valves. The thermionic valve tester (10) also has a display (13) comprising a series of LED lights, three user operated buttons (16), and a single power supply socket or terminal (14) which supplies power to all components of the valve tester and which is adapted for connection to a low voltage DC power supply lead. Internally, the thermionic valve tester (10) has a plurality of voltage regulators each with a switchable connection to at least one valve electrode terminal of the valve sockets (12) and a memory in which is stored the tests and the performance criteria for different types of thermionic valves.

Abstract: This disclosure relates to a dispenser which in one embodiment is a motorized electric dispenser that reliably detects a request for a portion of product and electromechanically dispenses a pre-determined length of product to the user, without the user needing to directly touch any part of the dispenser. The dispenser comprises a product path passing between an engagement opening and a capacitive sensor. A controller is operatively configured to identify a dispense request based upon a detection signal received from the capacitive sensor and activate a drive motor upon the identification of the dispense request. The dispense request is defined as an introduction of a user target within an introduction threshold distance from the capacitive sensor followed by a removal of the user target beyond a removal threshold distance away from the capacitive sensor.

Abstract: The audiovisual teaching apparatus (2) for demonstration purposes before a group of students has a frame (6) on which is mounted a board (4). The front surface of the board (4) includes an area (5) treated to function as a whiteboard surface on which standard dry-maker pens can be used to removably write and draw on the surface. The whiteboard surface (5) is pre-printed with a plurality of musical staves (8) and has an array of substantially parallel conductive tracks aligned with the lines and spaces of the musical staves (8). The conductive tracks are connected to sound reproduction apparatus and a hand-held wand (24), which includes a localized antenna, is adapted to select an individual line or space of the musical stave (8) so that the selected note is played by the sound reproduction apparatus.

Abstract: This disclosure relates to a dispenser which in one embodiment is a motorized electric dispenser that reliably detects a request for a portion of product and electromechanically dispenses a pre-determined length of product to the user, without the user needing to directly touch any part of the dispenser. The dispenser comprises a product path passing between an engagement opening and a capacitive sensor. A controller is operatively configured to identify a dispense request based upon a detection signal received from the capacitive sensor and activate a drive motor upon the identification of the dispense request. The dispense request is defined as an introduction of a user target within an introduction threshold distance from the capacitive sensor followed by a removal of the user target beyond a removal threshold distance away from the capacitive sensor.

Abstract: The audiovisual teaching apparatus (2) for demonstration purposes before a group of students has a frame (6) on which is mounted a board (4). The front surface of the board (4) includes an area (5) treated to function as a whiteboard surface on which standard dry-maker pens can be used to removably write and draw on the surface. The whiteboard surface (5) is pre-printed with a plurality of musical staves (8) and has an array of substantially parallel conductive tracks aligned with the lines and spaces of the musical staves (8). The conductive tracks are connected to sound reproduction apparatus and a hand-held wand (24), which includes a localized antenna, is adapted to select an individual line or space of the musical stave (8) so that the selected note is played by the sound reproduction apparatus.

Abstract: A hybrid towel dispenser is provided that can be operated in an automatic dispensing mode and a manual dispensing mode. The dispenser includes a drum having a retractable knife that extends out of the drum when the drum rotates past a selected position and severs a towel segment from a towel sheet. The dispenser also includes a motor, a manual advance assembly, and a one-way rotational coupling that couples the motor to the drum such that the motor rotates the drum in the automatic dispensing mode and a user can rotate the drum in the manual dispensing mode separately from the motor, using the manual advance assembly.

Abstract: A hybrid towel dispenser is provided that can be operated in an automatic dispensing mode and a manual dispensing mode. The dispenser includes a drum having a retractable knife that extends out of the drum when the drum rotates past a selected position and severs a towel segment from a towel sheet. The dispenser also includes a motor, a manual advance assembly, and a one-way rotational coupling that couples the motor to the drum such that the motor rotates the drum in the automatic dispensing mode and a user can rotate the drum in the manual dispensing mode separately from the motor, using the manual advance assembly.

Abstract: A hybrid towel dispenser is provided that is operable in an automatic dispensing mode and a manual dispensing mode. The paper towel dispenser comprises: a rotatable drum that advances a paper towel sheet applied on the drum when the drum rotates; a one-way rotational coupling; a motor coupled to the drum by the one-way rotational coupling and automatically operable to rotate the drum; and a manual advance assembly coupled to the drum and manually operable by a user to rotate the drum. The one-way rotational coupling couples the motor to the drum such that the motor drives the drum in a first direction and does not drive the drum when the manual advance assembly is operated to rotate the drum in the first direction.

Abstract: A hybrid towel dispenser is provided that can be operated in an automatic dispensing mode and a manual dispensing mode. The dispenser includes a drum having a retractable knife that extends out of the drum when the drum rotates past a selected position and severs a towel segment from a towel sheet. The dispenser also includes a motor, a manual advance assembly, and a one-way rotational coupling that couples the motor to the drum such that the motor rotates the drum in the automatic dispensing mode and a user can rotate the drum in the manual dispensing mode separately from the motor, using the manual advance assembly.

Abstract: A hybrid towel dispenser is provided that can be operated in an automatic dispensing mode and a manual dispensing mode. The dispenser includes a drum having a retractable knife that extends out of the drum when the drum rotates past a selected position and severs a towel segment from a towel sheet. The dispenser also includes a motor, a manual advance assembly, and a one-way rotational coupling that couples the motor to the drum such that the motor rotates the drum in the automatic dispensing mode and a user can rotate the drum in the manual dispensing mode separately from the motor, using the manual advance assembly.

Abstract: A two-roll dispenser is disclosed for a plurality of rolls of products, in one embodiment a plurality of toilet paper rolls. The operation of resetting the device to accept replacement rolls of product is achieved by opening the casing. The seer mechanism is also disclosed in one form maintaining a secondary roll of product in a reserve position until a primary roll of product is substantially consumed. The seer mechanism is also disclosed in another form maintaining a casing door in a reserve position until a primary roll of product is substantially consumed. In one form, rolls of product having a partial or split core are utilized to achieve the objects of this disclosure.

Abstract: A center pull towel mechanism having an adjustable iris system where a locking system is configured to enclose the surfaces defining the towel iris. In one form the adjustable iris system automatically adjusts the cross-sectional opening with an adjustable member positioned in the transverse rearward portion with respect to the towlette members interposed therein.

Abstract: A two-roll dispenser is disclosed for a plurality of rolls of products, in one embodiment a plurality of toilet paper rolls. The operation of resetting the device to accept replacement rolls of product is achieved by opening the casing. The seer mechanism is also disclosed maintaining a secondary roll of product in a reserve position until a primary roll of product is substantially consumed. In one form, rolls of product having a partial or split core are utilized to achieve the objects of this disclosure.

Abstract: A two-roll dispenser is disclosed for a plurality rolls of products, in one embodiment a plurality of toilet paper rolls. The operation of resetting the device to accept replacement rolls of product is achieved by opening and re-closing the casing. The seer mechanism is also disclosed, maintaining a casing door in a reserve position until a primary roll of product is substantially consumed. In one form, rolls of product having a partial or split core are utilized to achieve the objects of this disclosure.

Abstract: A method and apparatus for recycling water based workpart cleaning fluid of the type used to wash workparts (B) free of soils, such as emulsified and non-emulsified cutting oils and lubricants, particulate matter and other hydrophobic fluids. A parts washer (12) is provided for cleaning workparts (B) contaminated with soils. The contaminated cleaning fluid is discharged from the parts washer (12) in a slip stream and directed to a process tank (22). The contaminated cleaning fluid is pumped from the process tank (22) to a prefilter (28) where large particles are screened. The cleaning fluid is then directed to regenerated cellulose membrane filters (34) where the water based cleaning fluid and the hydrophilic water soluble substances in the base, i.e., the detergents, are imbibed through the membrane (34) as permeate while the soils pass as retentate. The permeate is returned to the parts washer (12), whereas the retentate is directed back to the process tank (22).

Abstract: An apparatus and process for treating water contaminated with hydrocarbons utilizes a dual membrane apparatus wherein contaminated water is first treated by a cellulose based membrane to produce a permeate fraction that is clarified and has a reduced content of hydrocarbons. The clarified permeate fraction is then treated with a reverse osmosis or nanofiltration membrane to produce a purified permeate water having an additionally lowered content of hydrocarbons.